POLYESTER COMBINED FILAMENT UNDRAWN YARN

摘要

PROBLEM TO BE SOLVED: To obtain a polyester combined filament undrawn yarn useful for providing a medium-thick woven or knitted fabric excellent in deep color properties and having a dry touch feeling and high fullness. SOLUTION: This polyester combined filament undrawn yarn is characterized in that the yarn comprises a high-elongation fiber group A composed of a copolyester containing 0.4-5.0 wt.% of colloidal silica fine particles having 0.02-0.10 mm average primary particle diameter and copolymerized with 1.0-4.0 wt.% of a polyalkylene glycol and a lowest-elongation fiber group B having >=80% elongation thereof and has >=20% difference between the high-elongation fiber group A and the lowest-elongation fiber group B in the maximum elongation and 40-75 wt.% combined filament ratio of the high-elongation fiber group A in the polyester combined filament undrawn yarn comprising two or more kinds of the fiber groups different in elongation.